With the help of a bike, probably the four corbetts south of Glen Feshie at 65km and 2,300m
By foot only, some different mixes of distance and height incl:
- Mamores M10 at 41km and 3,900m
- Gairich to Sgurr na Ciche from Loch Arkaig M5 C1 at 44.5km and 3,170m
- Glen Lednock loop M1 C3 G1 at 44km and 2,600m
as well as some long Donalds' days
Nowadays I tend to go for shorter routes with longer routes generally involving an overnight camp - cheers